Who Gives A Fish Forums

Good point, paren. Gradual changes are always better. I use a digital thermometer to keep an eye on things. The stick-on ones can be kinda unreliable.

Yep, 78-82F is the sweet spot. I use a 50W adjustable heater in my 5-gallon, and it keeps the temp steady. Just make sure to get one with a thermostat.